watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.4.933:3611]
Modules linked in:
CPU: 1 PID: 3611 Comm: syz.4.933 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rcu_read_unlock_special+0x341/0x430 kernel/rcu/tree_plugin.h:647
Code: f3 00 00 00 41 8b 37 4c 89 f7 e8 4a ad 1e 00 eb 0a bf 09 00 00 00 e8 2e 7e e9 ff 48 8b 44 24 20 48 89 44 24 38 ff 74 24 38 9d <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc9000107e7c0 EFLAGS: 00000202
RAX: 0000000000000202 RBX: 1ffff9200020fd00 RCX: 0000000000000009
RDX: 0000000000000000 RSI: ffffffff84e7b320 RDI: ffffffff85408e20
RBP: ffffc9000107e888 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200020fd28 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881f71572c0 R15: ffffffff86599088
FS:  00007f248d4c96c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f248d4c8ff8 CR3: 000000011b6c6000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 __rcu_read_unlock+0x5e/0xa0 kernel/rcu/tree_plugin.h:399
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 net_generic include/net/netns/generic.h:47 [inline]
 tipc_sk_lookup+0xe3/0x5f0 net/tipc/socket.c:2995
 tipc_sk_rcv+0x350/0x1dc0 net/tipc/socket.c:2490
 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754
 tipc_sk_rcv+0x18ed/0x1dc0 net/tipc/socket.c:2499
 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674
 tipc_sk_push_backlog net/tipc/socket.c:1306 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2255 [inline]
 tipc_sk_filter_rcv+0x15e5/0x39d0 net/tipc/socket.c:2364
 tipc_sk_enqueue net/tipc/socket.c:2444 [inline]
 tipc_sk_rcv+0x742/0x1dc0 net/tipc/socket.c:2495
 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754
 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2412
 sk_backlog_rcv include/net/sock.h:1071 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2589
 release_sock net/core/sock.c:3142 [inline]
 sock_setsockopt+0x1840/0x2680 net/core/sock.c:1257
 __sys_setsockopt+0x272/0x480 net/socket.c:2142
 __do_sys_setsockopt net/socket.c:2157 [inline]
 __se_sys_setsockopt net/socket.c:2154 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2154
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f248ea8fe59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f248d4c9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f248ed09090 RCX: 00007f248ea8fe59
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000006
RBP: 00007f248eb25d6f R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f248ed09128 R14: 00007f248ed09090 R15: 00007fff1c9a0c08
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 300 Comm: kworker/u4:3 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x209/0x490 kernel/smp.c:517
Code: 48 44 89 f6 83 e6 01 31 ff e8 63 89 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 9e 85 0a 00 e9 a4 00 00 00 f3 90 <f7> 44 24 48 01 00 00 00 0f 84 8f 00 00 00 e8 84 85 0a 00 eb e9 e8
RSP: 0018:ffffc90007987720 EFLAGS: 00000293
RAX: ffffffff815a404c RBX: 0000000000000000 RCX: ffff888127480000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90007987810 R08: ffff8881f7157647 R09: 1ffff1103ee2aec8
R10: dffffc0000000000 R11: ffffed103ee2aec9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff92000f30ee8
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1278a8f7c CR3: 000000000640f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 smp_call_function_many_cond+0x90a/0xa00 kernel/smp.c:653
 smp_call_function_many kernel/smp.c:716 [inline]
 smp_call_function kernel/smp.c:738 [inline]
 on_each_cpu+0xab/0x180 kernel/smp.c:837
 text_poke_sync arch/x86/kernel/alternative.c:1568 [inline]
 text_poke_bp_batch+0x1cb/0x5f0 arch/x86/kernel/alternative.c:1768
 text_poke_flush arch/x86/kernel/alternative.c:1959 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1966
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:126
 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:459
 jump_label_update+0x34c/0x3e0 kernel/jump_label.c:825
 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:207
 static_key_disable+0x1a/0x30 kernel/jump_label.c:215
 toggle_allocation_gate+0x3a5/0x440 mm/kfence/core.c:638
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13c0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298